21GSMBSS网络性能PSKPI优化手册doc 

21 GSM BSS 网络性能PS KPI优化手册

doc

GSM BSS

网络性能PS KPI(上行TBF建立成功率)优化手册产品版本Product version

密级Confidentiality level

内部公开

Total 32pages 共32页

GSM BSS 网络性能PS KPI（上行TBF建立成功率）

优化手册

(仅供内部使用）For internal use only

Prepared byGSM &UMTS

研究部

网络性能日期：Date日期：Date 日期：Date 日期：Date

2008-11-23

审核: Reviewed by 审核: Reviewed by 批准: Granted by

yyyy-mm-dd

yyyy-mm-dd

yyyy-mm-dd

华为技术有限公司Huawei Technologies Co., Ltd.

版权所有

侵权必究

All rights reserved

修订记录Revision Record

日期Date

修订版本Revision version

2008-11-23

1.0

完成初稿

王光华00110102

2008-12-25

1.0

根据意见修改完成

王光华00110102

2009-7-30

1.0

新增“涉及特性”

杨召青

修改描述change Description

作者Author

GSM BSS 网络性能PS KPI（上行TBF建立成功率）

优化手册

关键词：上行TBF ，建立成功率摘

要：本文主要阐述上行

TBF建立成功率的统计方法和优化手段。

缩略语清单List of abbreviations：

Abbreviations

缩略语PDCH PCU MS CQT KPI DT GPRS EDGE

Full spelling 英文全名

Packet Data CHannel Packet Control Unit Mobile Station Call Quality Test Key Performance Index Drive Test

General Packet Radio Service Enhanced Data rates for GSM Evolution

Chinese explanation

中文解释

分组数据信道分组控制单元移动台呼叫质量测试关键性能指标驱车测试通用分组无线业务GSM演进增强数据速率

目录

1

基本原理................................................................................................................................... 71.1

指标含义....................................................................................................................... 71.1.1 考核空口................................................................................................................ 71.1.2 考核资源................................................................................................................ 71.1.3 同时考核空口和资源1.2 2

2.1

............................................................................................ 7

理论介绍....................................................................................................................... 8上行TBF建立成功次数.............................................................................................. 82.1.1 含义........................................................................................................................ 82.1.2 测量点.................................................................................................................... 82.2

上行TBF建立失败.................................................................................................... 10 2.2.1 含义...................................................................................................................... 10 2.2.2 测量点.................................................................................................................. 10 2.3

上行TBF建立尝试次数............................................................................................ 11 2.3.1 含义...................................................................................................................... 11 2.3.2 测量点.................................................................................................................. 11

3

分析和优化方法..................................................................................................................... 13 3.1 3.2

Abis链路是否存在问题指配消息是否正常下发

............................................................................................. 16 ............................................................................................. 17

.............................................................. 17

...................................................... 18

信令流程................................................................................................................................... 8

3.2.1 CCCH过载导致立即指配消息被丢弃3.2.2 无信道导致网络侧发送立即指配拒绝消息3.3 3.4

下行空口是否正常手机是否响应指配命令3.4.1 上行编码方式过高3.4.3 参数设置不合理导致3.4.4 指配消息信元错误3.4.5 是否存在上下行不平衡

..................................................................................................... 20

............................................................................................. 21 .............................................................................................. 21

.................................................................................. 22

...................................... 23

MS没有及时接入指配的信道

3.4.2 上行功控参数设置不合理

.............................................................................................. 24

...................................................................................... 26

3.4.6 检查天馈.............................................................................................................. 26 3.4.7 关注CS域KPI指标 .......................................................................................... 26

4

案例......................................................................................................................................... 26 4.1 4.2 4.3 5

案例1 成都网络室内小区功控参数设置不合理造成案例2 捷克跳频参数错误导致上行案例2 白俄罗斯塔放因子配置错误导致上行

Attach时延长.................... 26

TBF建立成功率低....................................... 29

TBF建立成功率低 ....................... 32

问题信息反馈......................................................................................................................... 33